Hello James,
Thanks for your exhaustive response. Regarding your query on pre-calibrated "sRGB" profile, i had selected this from the drop down list of the "Display" option in my macbook and i had assigned the same during developing images.
While exporting to .jpeg, i didnt include the sRBG profile since i read in some articles to undo the option during export.
After trying out numerous option, i finally bought Spyder5 Pro calibrator and the output have changed drastically. However I have one query. Shall i assign the calibrated profile during developing of images in Affinity?? or shall i use the generic sRGB profile?
Thanks in advance.